u/Taohid101

Hello,
I've been building an app Speedometer: Driving Tracker, a CarPlay-supported driving tracker focused on trip history, analytics, and the overall driving experience across Apple devices.

Recently, I added real-time OBD2 analytics support after many users requested deeper vehicle insights.

You can now view live OBD2 data directly on CarPlay, iPhone, iPad, Mac, and even Apple Watch (via Live Activity).

Some supported data includes:
• Engine Load
• RPM
• Throttle Position
• Fuel Usage
• Coolant & Oil Temperature
• Mass Air Flow
• Intake/Ambient Air Temperature
• And more

What I personally found most interesting during testing was being able to review how different driving styles affected engine behavior across an entire trip, not just while looking at live gauges.

The app also supports automatic trip recording using Siri Shortcuts automations when your OBD2 device connects.

One important thing:
Every car exposes different OBD2 sensors, so available data can vary depending on the vehicle and adapter.

Beyond OBD2, the app also includes:
• CarPlay trip tracking
• 3D route playback
• Speed-colored trip replay
• Video recording with speed + map overlays
• Fuel, maintenance, and expense tracking
• Vehicle-based analytics & comparisons
• iCloud sync across Apple devices
• Privacy-first experience (no ads, no tracking, no signup)

The goal was never just to make another speedometer or gauge app, but to create a more complete driving companion ecosystem for drivers.

I would love feedback from fellow car enthusiasts here!

Hello,
I've been building an app Speedometer: Driving Tracker, a CarPlay-supported driving tracker focused on trip history, analytics, and the overall driving experience across Apple devices.

Recently, I added real-time OBD2 analytics support after many users requested deeper vehicle insights.

You can now view live OBD2 data directly on CarPlay, iPhone, iPad, Mac, and even Apple Watch (via Live Activity).

Some supported data includes:
• Engine Load
• RPM
• Throttle Position
• Fuel Usage
• Coolant & Oil Temperature
• Mass Air Flow
• Intake/Ambient Air Temperature
• And more

What I personally found most interesting during testing was being able to review how different driving styles affected engine behavior across an entire trip, not just while looking at live gauges.

The app also supports automatic trip recording using Siri Shortcuts automations when your OBD2 device connects.

One important thing:
Every car exposes different OBD2 sensors, so available data can vary depending on the vehicle and adapter.

Beyond OBD2, the app also includes:
• CarPlay trip tracking
• 3D route playback
• Speed-colored trip replay
• Video recording with speed + map overlays
• Fuel, maintenance, and expense tracking
• Vehicle-based analytics & comparisons
• iCloud sync across Apple devices
• Privacy-first experience (no ads, no tracking, no signup)

The goal was never just to make another speedometer or gauge app, but to create a more complete driving companion ecosystem for drivers.

I would love feedback from fellow car enthusiasts here!

Hello,
I’ve been building an app Speedometer: Driving Tracker, a CarPlay-supported driving tracker focused on trip history, analytics, and the overall driving experience across Apple devices.

Recently, I added real-time OBD2 analytics support after many users requested deeper vehicle insights.

You can now view live OBD2 data directly on CarPlay, iPhone, iPad, Mac, and even Apple Watch (via Live Activity).

Some supported data includes:
• Engine Load
• RPM
• Throttle Position
• Fuel Usage
• Coolant & Oil Temperature
• Mass Air Flow
• Intake/Ambient Air Temperature
• And more

What I personally found most interesting during testing was being able to review how different driving styles affected engine behavior across an entire trip, not just while looking at live gauges.

The app also supports automatic trip recording using Siri Shortcuts automations when your OBD2 device connects.

One important thing:
Every car exposes different OBD2 sensors, so available data can vary depending on the vehicle and adapter.

Beyond OBD2, the app also includes:
• CarPlay trip tracking
• 3D route playback
• Speed-colored trip replay
• Video recording with speed + map overlays
• Fuel, maintenance, and expense tracking
• Vehicle-based analytics & comparisons
• iCloud sync across Apple devices
• Privacy-first experience (no ads, no tracking, no signup)

The goal was never just to make another speedometer or gauge app, but to create a more complete driving companion ecosystem for drivers.

I would love feedback from fellow car enthusiasts here!

Hello,
I’ve been building an app Speedometer: Driving Tracker, a CarPlay-supported driving tracker focused on trip history, analytics, and the overall driving experience across Apple devices.

Recently, I added real-time OBD2 analytics support after many users requested deeper vehicle insights.

You can now view live OBD2 data directly on CarPlay, iPhone, iPad, Mac, and even Apple Watch (via Live Activity).

Some supported data includes:
• Engine Load
• RPM
• Throttle Position
• Fuel Usage
• Coolant & Oil Temperature
• Mass Air Flow
• Intake/Ambient Air Temperature
• And more

What I personally found most interesting during testing was being able to review how different driving styles affected engine behavior across an entire trip, not just while looking at live gauges.

The app also supports automatic trip recording using Siri Shortcuts automations when your OBD2 device connects.

One important thing:
Every car exposes different OBD2 sensors, so available data can vary depending on the vehicle and adapter.

Beyond OBD2, the app also includes:
• CarPlay trip tracking
• 3D route playback
• Speed-colored trip replay
• Video recording with speed + map overlays
• Fuel, maintenance, and expense tracking
• Vehicle-based analytics & comparisons
• iCloud sync across Apple devices
• Privacy-first experience (no ads, no tracking, no signup)

The goal was never just to make another speedometer or gauge app, but to create a more complete driving companion ecosystem for drivers.

Hello everyone,
A lot of users from my previous CarPlay post requested OBD2 support, so after a lot of work, the feature is finally live in Speedometer: Driving Tracker.

You can now see and analyze real-time OBD2 vehicle data directly from CarPlay, iPhone, iPad, Mac, and Apple Watch (via live activity).

One thing I personally found really interesting while testing was seeing how different driving styles affect engine behavior throughout an entire trip, not just live gauges while driving.

For example, things like:
• Engine Load
• RPM
• Throttle Position
• Coolant & Oil Temperature
• Fuel Usage
• Mass Air Flow
• Intake/Ambient Air Temperature
• And more

I added a sample trip summary screenshot below showing how the app now visualizes engine performance for a drive.

It even works with automatic trip recording through Shortcuts automations (when OBD2 device is connected), so trips can start recording automatically without manually opening the app.

One important note: every car exposes different OBD2 sensors, so some vehicles may not provide all data points shown in the screenshot.

The goal wasn’t just to make another OBD2 gauge app, but to make driving history and car data feel more visual, insightful, and actually enjoyable to revisit later.

Other existing features in the app:
• CarPlay trip tracking
• 3D route playback
• Speed-colored trip replay
• Video recording with speed + map overlays
• Fuel, maintenance, and expense tracking
• Vehicle-based analytics & comparisons
• iCloud sync across Apple devices
• Privacy-first experience (no ads/tracking/signups)

Now it’s becoming one of the most comprehensive driving tracker apps available on any platform, whether iOS or Android!

Would genuinely love feedback from fellow car enthusiasts on what data, analytics, or visualizations you’d like to see.

Hey everyone,
I’ve been building an app, a CarPlay-supported driving tracker focused on trip history, analytics, and the overall driving experience across Apple devices.

Recently, I added real-time OBD2 analytics support after many users requested deeper vehicle insights.

You can now view live OBD2 data directly on CarPlay, iPhone, iPad, Mac, and even Apple Watch (via Live Activity).

Some supported data includes:
• Engine Load
• RPM
• Throttle Position
• Fuel Usage
• Coolant & Oil Temperature
• Mass Air Flow
• Intake/Ambient Air Temperature
• And more

What I personally found most interesting during testing was being able to review how different driving styles affected engine behavior across an entire trip, not just while looking at live gauges.

The app also supports automatic trip recording using Siri Shortcuts automations when your OBD2 device connects.

One important thing:
Every car exposes different OBD2 sensors, so available data can vary depending on the vehicle and adapter.

Beyond OBD2, the app also includes:
• CarPlay trip tracking
• 3D route playback
• Speed-colored trip replay
• Video recording with speed + map overlays
• Fuel, maintenance, and expense tracking
• Vehicle-based analytics & comparisons
• iCloud sync across Apple devices
• Privacy-first experience (no ads, no tracking, no signup)

The goal was never just to make another speedometer or gauge app, but to create a more complete driving companion ecosystem for drivers.

Would genuinely love feedback from fellow car enthusiasts here.

Hey everyone,
A lot of users from my previous CarPlay post requested OBD2 support, so after a lot of work, the feature is finally live in Speedometer: Driving Tracker.

You can now see and analyze real-time OBD2 vehicle data directly from CarPlay, iPhone, iPad, Mac, and Apple Watch (via live activity).

One thing I personally found really interesting while testing was seeing how different driving styles affect engine behavior throughout an entire trip, not just live gauges while driving.

For example, things like:
• Engine Load
• RPM
• Throttle Position
• Coolant & Oil Temperature
• Fuel Usage
• Mass Air Flow
• Intake/Ambient Air Temperature
• And more

I added a sample trip summary screenshot below showing how the app now visualizes engine performance for a drive.

It even works with automatic trip recording through Shortcuts automations (when OBD2 device is connected), so trips can start recording automatically without manually opening the app.

One important note: every car exposes different OBD2 sensors, so some vehicles may not provide all data points shown in the screenshot.

The goal wasn’t just to make another OBD2 gauge app, but to make driving history and car data feel more visual, insightful, and actually enjoyable to revisit later.

Other existing features in the app:
• CarPlay trip tracking
• 3D route playback
• Speed-colored trip replay
• Video recording with speed + map overlays
• Fuel, maintenance, and expense tracking
• Vehicle-based analytics & comparisons
• iCloud sync across Apple devices
• Privacy-first experience (no ads/tracking/signups)

Now it’s becoming one of the most comprehensive driving tracker apps available on any platform, whether iOS or Android! (iOS version is live, Android version is in progress)

Would genuinely love feedback from fellow car enthusiasts on what data, analytics, or visualizations you’d like to see next.

A while ago, I shared my CarPlay driving tracker project here and got a lot of useful feedback from long-distance drivers.

Goal:
Make long-distance CarPlay trip recording reliable enough that users could drive hundreds of miles without worrying about the app stopping midway.

Recently, a few users started reporting that their phones became unusually hot during extended drives, and in some cases iOS would eventually terminate the app in the background after long trips.

The weird part:

• Couldn’t reproduce it reliably in the simulator
• CPU usage initially looked "fine"
• Most shorter trips worked perfectly

Because the issue only appeared during long drives, reproducing it became surprisingly difficult. For the last few days my car basically became a moving test lab because shorter trips almost never triggered the issue.

I spent long hours testing both while idling and driving, sometimes with the help of another driver. At one point I even got tired, slept inside the car for a while, woke up, and continued testing again.

The main discovery:
CarPlay apps using image-heavy tile dashboards can do dramatically more rendering work than text-based templates.

CarPlay itself seems heavily optimized around:

• text rendering
• glanceability
• predictable layouts
• low distraction
• low thermal overhead

With text-focused templates, the framework mostly sends structured text/layout information to the head unit and the car handles rendering using native automotive typography.

But image-heavy dashboards are different. The iPhone ends up repeatedly rasterizing parts of the UI into bitmaps and pushing those rendered images through the CarPlay pipeline over and over again.

On long drives, especially while charging + navigation + podcasts are active, the extra rendering work accumulates surprisingly fast.

What improved after the redesign:

• CPU usage dropped massively
• Thermal behavior improved
• Long-trip stability became dramatically better

The latest update now supports recording hundreds of miles in a single trip much more smoothly without interruptions.

One thing that makes this difficult is there really aren’t many apps in this segment with full CarPlay support under Apple’s Driving Task category, so a lot of the optimization process becomes deep trial-and-error R&D within Apple’s very strict UI constraints.

Honestly gave me a new appreciation for why CarPlay apps look much simpler than most people expect.

For fellow developers:
Defaulting to simpler text-based templates for frequently updating driving data seems dramatically more efficient than image-heavy dashboard rendering, especially for long trips.

For curious CarPlay users:
If you’ve ever wondered why many CarPlay apps look simpler than expected, thermal limits, rendering overhead, distraction rules, and Apple’s strict UI constraints are a huge part of it.

App Store Link

One thing I always felt with my Civic is that some of the most fun parts of driving completely disappear once the trip ends.

You drive a nice route, have a fun pull, discover a good road, or go on a long night drive… and later there’s almost no real memory/history of it besides maybe fuel usage and a map route.

So over the last couple of years, I started building my own app around that idea using my Civic as the main development/testing car.

It started as a simple GPS speedometer, but eventually evolved into more of a driving companion focused on:

• trip history
• route replay
• driving analytics
• memorable drives
• fuel & maintenance tracking
• driving comparisons over time
• CarPlay integration
• visual trip playback/sharing

One feature I personally enjoy a lot is replaying routes afterward and seeing exactly where peak speed moments, hard pulls, elevation changes, or interesting driving sections happened.

I recently also got the app approved for CarPlay in Apple’s Driving Task category, which apparently has very strict limitations regarding UI and interactions.

The whole idea became:
"What if Apple Health/Strava existed for your driving life?"

So instead of only live speed, it tries to preserve:

• your driving history
• patterns
• routes
• road trips
• driving memories

Curious if anyone else here enjoys tracking/logging their drives just for fun or history?

Privacy was a huge focus while building it: no ads, no tracking SDKs, no accounts/signups, and no data selling. Everything stays on-device or in your own iCloud.

One thing I always felt with my Civic is that some of the most fun parts of driving completely disappear once the trip ends.

You drive a nice route, have a fun pull, discover a good road, or go on a long night drive… and later there’s almost no real memory/history of it besides maybe fuel usage and a map route.

So over the last couple of years, I started building my own app around that idea using my Civic as the main development/testing car.

It started as a simple GPS speedometer, but eventually evolved into more of a driving companion focused on:

• trip history
• route replay
• driving analytics
• memorable drives
• fuel & maintenance tracking
• driving comparisons over time
• CarPlay integration
• visual trip playback/sharing

One feature I personally enjoy a lot is replaying routes afterward and seeing exactly where peak speed moments, hard pulls, elevation changes, or interesting driving sections happened.

I recently also got the app approved for CarPlay in Apple’s Driving Task category, which apparently has very strict limitations regarding UI and interactions.

The whole idea became:
"What if Apple Health/Strava existed for your driving life?"

So instead of only live speed, it tries to preserve:

• your driving history
• patterns
• routes
• road trips
• driving memories

Curious if anyone else here enjoys tracking/logging their drives just for fun or history?

Privacy was a huge focus while building it: no ads, no tracking SDKs, no accounts/signups, and no data selling. Everything stays on-device or in your own iCloud.

Hello,
I’ve been working on a driving app called Speedometer: Driving Tracker for a while, and it recently got approved for CarPlay in the Driving Task category.

That approval process is surprisingly strict - very limited UI, no custom buttons, and a strong focus on safety; so getting through it meant a lot.

The app originally started as a simple speedometer, but over time, I expanded it into something more like a driving companion. It tracks trips, shows analytics, and tries to make driving data more visual instead of just numbers.

Some things it currently supports:

• Trip tracking with detailed stats
• Route playback (including 3D-style views)
• Visual trip sharing
• Fuel, maintenance, and expense tracking
• Driving pattern insights and comparisons
• Video recording with speed + map overlays
• iCloud sync across devices and backup
• Privacy-focused (no ads or tracking)

The idea is to offer something beyond what most built-in dashboards show, while still working within CarPlay’s limitations.

Would love to hear any thoughts or feedback.

Hello everyone,
Big update for Speedometer: Driving Tracker - the CarPlay app is now live!

Getting approved for CarPlay in the driving task category is tough and one of the hardest CarPlay categories to get through Apple’s review process, so this honestly means a lot.

You can now track drives directly from your car’s screen while also getting insights that many built-in dashboards simply don’t provide.

Another thing I’ve been heavily focusing on lately is making driving memories feel more visual and shareable instead of just raw numbers.

Some newer features include:

• Stunning trip sharing layouts with customizable stats
• Beautiful 3D route playback
• Full-screen route replay with speed-colored paths
• Video recording with live speed + map overlays
• Fuel tracking, maintenance logs, expenses, and reminders
• Vehicle-based trip analytics and comparisons
• iCloud sync for trips, fuel logs, maintenance records, and more
• Privacy-first experience with no ads or tracking

The goal is to make it feel more like a complete driving companion rather than just another GPS speedometer.

Would genuinely love to hear your feedback or ideas!

Hey everyone,
Big update for Speedometer: Driving Tracker - the CarPlay app is now live!

Getting approved for CarPlay in the driving task category is tough and one of the most difficult CarPlay categories to get through Apple’s review process, so this honestly means a lot.

You can now track drives directly from your car’s screen while also getting insights that many built-in dashboards simply don’t provide.

Another thing I’ve been heavily focusing on lately is making driving memories feel more visual and shareable instead of just raw numbers.

Some newer features include:

• Stunning trip sharing layouts with customizable stats
• Beautiful 3D route playback
• Full-screen route replay with speed-colored paths
• Video recording with live speed + map overlays
• Fuel tracking, maintenance logs, expenses, and reminders
• Vehicle-based trip analytics and comparisons
• iCloud sync for trips, fuel logs, maintenance records, and more
• Privacy-first experience with no ads or tracking

The goal is to make it feel more like a complete driving companion rather than just another GPS speedometer.

Would love to hear your feedback or ideas!